Buggy code:
public class SpreadsheetAnalyzer { private Workbook workbook ; private Map < SpreadsheetAnalyzer . SheetLocation , SpreadsheetAnalyzer . InputCellReferencePackage > inputCellByReferenceMap = new HashMap < > ( ) ; private Map < String , Set < SpreadsheetAnalyzer . InputCellReferencePackage > > inputCellMap = new HashMap < > ( ) ; private Map < SpreadsheetAnalyzer . SheetLocation , SpreadsheetAnalyzer . CellReferencePackage > formulaCellByReferenceMap = new HashMap < > ( ) ; private Map < String , Set < SpreadsheetAnalyzer . CellReferencePackage > > formulaCellMap = new HashMap < > ( ) ; private Map < SpreadsheetAnalyzer . InputCellType , Integer > inputCellCounts = new EnumMap < > ( SpreadsheetAnalyzer . InputCellType . class ) ; private Map < String , Integer > functionCounts = new HashMap < > ( ) ; private Map < SpreadsheetAnalyzer . FunctionEvalType , Integer > evalTypeCounts = new EnumMap < > ( SpreadsheetAnalyzer . FunctionEvalType . class ) ; private final Pattern findFunctions = Pattern . compile ( "\\p{Upper}+\\(" ) ; private final Pattern findPotentialCellReferences = Pattern . compile ( "[^+-.,}{><();\\\\//*\'\\\"~]+" ) ; private Sheet currentSheet ; private SpreadsheetAnalyzer . InputCellType lastInputCellType ; private int formulasThatReferenceOtherCells ; private Map < SpreadsheetAnalyzer . InputCellType , Integer > referencedInputCells ; private int formulasReferencedByOtherCells ; private SpreadsheetAnalyzer ( Workbook wb ) { } public static SpreadsheetAnalyzer doEUSESAnalysis ( InputStream is ) throws IOException , InvalidFormatException { } private static Integer incrementOrInitialize ( Integer i ) { } private void analyzeEUSESMetrics ( ) { } private void findInputCells ( ) { } private SpreadsheetAnalyzer . FunctionEvalType getAndConvertCachedType ( Cell cell ) { if ( ( cell . getCachedFormulaResultType ( ) ) == ( Cell . CELL_TYPE_NUMERIC ) ) { if ( DateUtil . isCellDateFormatted ( cell ) ) { return SpreadsheetAnalyzer . FunctionEvalType . DATE ; } double d = cell . getNumericCellValue ( ) ; if ( ( Math . rint ( d ) ) == d ) { return SpreadsheetAnalyzer . FunctionEvalType . INTEGER ; } else { return SpreadsheetAnalyzer . FunctionEvalType . NON_INTEGER_NUMBER ; } } else { <START_BUG> return SpreadsheetAnalyzer . FunctionEvalType . fromCellType ( cell . getCellType ( ) ) ; <END_BUG> } } private void handleFormulas ( Cell cell ) { } private void addFormulaToReferenceMaps ( Cell cell ) { } private void findFunctionsUsed ( String functionString ) { } private void handleInputCell ( Cell cell ) { } private void clearPreviousMetrics ( ) { } private void findReferencedCells ( ) { } private void countFormulaCellsReferenced ( ) { } private void processFormulaReferences ( Cell cell ) { } private void checkInputCellReferences ( CellRangeAddress cra , String sheetName ) { } private void checkFormulaCellReferences ( CellRangeAddress cra , String sheetName ) { } private void checkReferences ( CellRangeAddress cra , Set < ? extends SpreadsheetAnalyzer . CellReferencePackage > set ) { } private void checkInputCellReferences ( CellReference cr ) { } private void checkFormulaCellReferences ( CellReference cr ) { } private void condenseInputCellReferencesFromAllSheets ( ) { } public Map < String , Integer > getFunctionCounts ( ) { } public Map < SpreadsheetAnalyzer . InputCellType , Integer > getInputCellCounts ( ) { } public Map < SpreadsheetAnalyzer . FunctionEvalType , Integer > getFormulaCellCounts ( ) { } public Map < SpreadsheetAnalyzer . InputCellType , Integer > getInputReferences ( ) { } public enum FunctionEvalType { INTEGER , BOOLEAN , DATE , ERROR , NON_INTEGER_NUMBER , STRING , BLANK ; public static SpreadsheetAnalyzer . FunctionEvalType fromCellType ( int cellType ) { } } public enum InputCellType { INTEGER , BOOLEAN , DATE , ERROR , NON_INTEGER_NUMBER , STRING ; public static SpreadsheetAnalyzer . InputCellType fromCellType ( int cellType ) { } } private static class CellReferencePackage { public Cell cell ; public boolean isReferenced ; public CellReferencePackage ( Cell cell ) { } } private static class InputCellReferencePackage extends SpreadsheetAnalyzer . CellReferencePackage { public SpreadsheetAnalyzer . InputCellType type ; public InputCellReferencePackage ( Cell cell , SpreadsheetAnalyzer . InputCellType type ) { } } private static class SheetLocation { private final String s ; public SheetLocation ( Cell c ) { } public SheetLocation ( CellReference cr ) { } @ Override public int hashCode ( ) { } @ Override public boolean equals ( Object obj ) { } } public int getFormulaReferencingOtherCells ( ) { } public int getFormulasReferenced ( ) { } }

Fix:
return SpreadsheetAnalyzer . FunctionEvalType . fromCellType ( cell . getCachedFormulaResultType ( ) ) ;